A burning issue

Further to Robert BISHOP in the last post (Resurrecting Robert) - we can now guess how come he was in jail in 1900.
Found a newspaper report (27 Oct 1899 San Diego Union) of an arson of his heavily insured and heavily mortgaged property, in which he, "Robert Bishop an old man", and his son "H L Bishop", lived keeping "a saloon in the front part".
Both were accused of the arson and arrested.
Haven't found a report of any trial, but Robert is known to be in jail in 1900 and Harold was living with his sister and her husband at the same census.